Hello,
ixgbe_dcb_config_82599 should leave the MRQC register alone if it's already
configured for 8 PGs with RSS.
Without this patch, the following sequence of events happen that force RSS to
be deconfigured.
1. the MRQC register is configured with IXGBE_MRQC_RTRSS8TCEN in
ixgbe_setup_mrqc
2. ixgbe_dcb_config_82599 is called again from within ixgbe_dcbnl_set_all (via
ixgbe_dcb_hw_config_cee). The 'default' switch label is picked and RSS gets
deconfigured.
Cosmin.
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